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llvm-project/clang/Driver/clang.cpp

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//===--- clang.cpp - C-Language Front-end ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
// clang --help - Output help info.
// clang [options] - Read from stdin.
// clang [options] file - Read from "file".
// clang [options] file1 file2 - Read these files.
//
//===----------------------------------------------------------------------===//
//
// TODO: Options to support:
//
// -ffatal-errors
// -ftabstop=width
//
//===----------------------------------------------------------------------===//
#include "clang.h"
#include "ASTConsumers.h"
#include "TextDiagnosticBuffer.h"
#include "TextDiagnosticPrinter.h"
#include "clang/AST/TranslationUnit.h"
#include "clang/Sema/ASTStreamer.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/Parse/Parser.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/System/Signals.h"
#include "llvm/Config/config.h"
#include "llvm/ADT/OwningPtr.h"
#include <memory>
using namespace clang;
//===----------------------------------------------------------------------===//
// Global options.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
Verbose("v", llvm::cl::desc("Enable verbose output"));
static llvm::cl::opt<bool>
Stats("print-stats",
llvm::cl::desc("Print performance metrics and statistics"));
enum ProgActions {
RewriteTest, // Rewriter testing stuff.
EmitLLVM, // Emit a .ll file.
EmitBC, // Emit a .bc file.
SerializeAST, // Emit a .ast file.
ASTPrint, // Parse ASTs and print them.
ASTDump, // Parse ASTs and dump them.
ASTView, // Parse ASTs and view them in Graphviz.
ParseCFGDump, // Parse ASTS. Build CFGs. Print CFGs.
ParseCFGView, // Parse ASTS. Build CFGs. View CFGs.
AnalysisLiveVariables, // Print results of live-variable analysis.
AnalysisGRConstants, // Perform graph-reachability constant prop.
WarnDeadStores, // Run DeadStores checker on parsed ASTs.
WarnDeadStoresCheck, // Check diagnostics for "DeadStores".
WarnUninitVals, // Run UnitializedVariables checker.
TestSerialization, // Run experimental serialization code.
ParsePrintCallbacks, // Parse and print each callback.
ParseSyntaxOnly, // Parse and perform semantic analysis.
ParseNoop, // Parse with noop callbacks.
RunPreprocessorOnly, // Just lex, no output.
PrintPreprocessedInput, // -E mode.
DumpTokens // Token dump mode.
};
static llvm::cl::opt<ProgActions>
ProgAction(llvm::cl::desc("Choose output type:"), llvm::cl::ZeroOrMore,
llvm::cl::init(ParseSyntaxOnly),
llvm::cl::values(
clEnumValN(RunPreprocessorOnly, "Eonly",
"Just run preprocessor, no output (for timings)"),
clEnumValN(PrintPreprocessedInput, "E",
"Run preprocessor, emit preprocessed file"),
clEnumValN(DumpTokens, "dumptokens",
"Run preprocessor, dump internal rep of tokens"),
clEnumValN(ParseNoop, "parse-noop",
"Run parser with noop callbacks (for timings)"),
clEnumValN(ParseSyntaxOnly, "fsyntax-only",
"Run parser and perform semantic analysis"),
clEnumValN(ParsePrintCallbacks, "parse-print-callbacks",
"Run parser and print each callback invoked"),
clEnumValN(ASTPrint, "ast-print",
"Build ASTs and then pretty-print them"),
clEnumValN(ASTDump, "ast-dump",
"Build ASTs and then debug dump them"),
clEnumValN(ASTView, "ast-view",
"Build ASTs and view them with GraphViz."),
clEnumValN(ParseCFGDump, "dump-cfg",
"Run parser, then build and print CFGs."),
clEnumValN(ParseCFGView, "view-cfg",
"Run parser, then build and view CFGs with Graphviz."),
clEnumValN(AnalysisLiveVariables, "dump-live-variables",
"Print results of live variable analysis."),
clEnumValN(WarnDeadStores, "warn-dead-stores",
"Flag warnings of stores to dead variables."),
clEnumValN(WarnUninitVals, "warn-uninit-values",
"Flag warnings of uses of unitialized variables."),
clEnumValN(AnalysisGRConstants, "grconstants",
"Perform path-sensitive constant propagation."),
clEnumValN(TestSerialization, "test-pickling",
"Run prototype serializtion code."),
clEnumValN(EmitLLVM, "emit-llvm",
"Build ASTs then convert to LLVM, emit .ll file"),
clEnumValN(EmitBC, "emit-llvm-bc",
"Build ASTs then convert to LLVM, emit .bc file"),
clEnumValN(SerializeAST, "serialize",
"Build ASTs and emit .ast file"),
clEnumValN(RewriteTest, "rewrite-test",
"Playground for the code rewriter"),
clEnumValEnd));
static llvm::cl::opt<std::string>
OutputFile("o",
llvm::cl::value_desc("path"),
llvm::cl::desc("Specify output file (for --serialize, this is a directory)"));
static llvm::cl::opt<bool>
VerifyDiagnostics("verify",
llvm::cl::desc("Verify emitted diagnostics and warnings."));
//===----------------------------------------------------------------------===//
// Language Options
//===----------------------------------------------------------------------===//
enum LangKind {
langkind_unspecified,
langkind_c,
langkind_c_cpp,
langkind_cxx,
langkind_cxx_cpp,
langkind_objc,
langkind_objc_cpp,
langkind_objcxx,
langkind_objcxx_cpp
};
/* TODO: GCC also accepts:
c-header c++-header objective-c-header objective-c++-header
assembler assembler-with-cpp
ada, f77*, ratfor (!), f95, java, treelang
*/
static llvm::cl::opt<LangKind>
BaseLang("x", llvm::cl::desc("Base language to compile"),
llvm::cl::init(langkind_unspecified),
llvm::cl::values(clEnumValN(langkind_c, "c", "C"),
clEnumValN(langkind_cxx, "c++", "C++"),
clEnumValN(langkind_objc, "objective-c", "Objective C"),
clEnumValN(langkind_objcxx,"objective-c++","Objective C++"),
clEnumValN(langkind_c_cpp, "c-cpp-output",
"Preprocessed C"),
clEnumValN(langkind_cxx_cpp, "c++-cpp-output",
"Preprocessed C++"),
clEnumValN(langkind_objc_cpp, "objective-c-cpp-output",
"Preprocessed Objective C"),
clEnumValN(langkind_objcxx_cpp,"objective-c++-cpp-output",
"Preprocessed Objective C++"),
clEnumValEnd));
static llvm::cl::opt<bool>
LangObjC("ObjC", llvm::cl::desc("Set base language to Objective-C"),
llvm::cl::Hidden);
static llvm::cl::opt<bool>
LangObjCXX("ObjC++", llvm::cl::desc("Set base language to Objective-C++"),
llvm::cl::Hidden);
/// InitializeBaseLanguage - Handle the -x foo options.
static void InitializeBaseLanguage() {
if (LangObjC)
BaseLang = langkind_objc;
else if (LangObjCXX)
BaseLang = langkind_objcxx;
}
static LangKind GetLanguage(const std::string &Filename) {
if (BaseLang != langkind_unspecified)
return BaseLang;
std::string::size_type DotPos = Filename.rfind('.');
if (DotPos == std::string::npos) {
BaseLang = langkind_c; // Default to C if no extension.
return langkind_c;
}
std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
// C header: .h
// C++ header: .hh or .H;
// assembler no preprocessing: .s
// assembler: .S
if (Ext == "c")
return langkind_c;
else if (Ext == "i")
return langkind_c_cpp;
else if (Ext == "ii")
return langkind_cxx_cpp;
else if (Ext == "m")
return langkind_objc;
else if (Ext == "mi")
return langkind_objc_cpp;
else if (Ext == "mm" || Ext == "M")
return langkind_objcxx;
else if (Ext == "mii")
return langkind_objcxx_cpp;
else if (Ext == "C" || Ext == "cc" || Ext == "cpp" || Ext == "CPP" ||
Ext == "c++" || Ext == "cp" || Ext == "cxx")
return langkind_cxx;
else
return langkind_c;
}
static void InitializeLangOptions(LangOptions &Options, LangKind LK) {
// FIXME: implement -fpreprocessed mode.
bool NoPreprocess = false;
switch (LK) {
default: assert(0 && "Unknown language kind!");
case langkind_c_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_c:
break;
case langkind_cxx_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_cxx:
Options.CPlusPlus = 1;
break;
case langkind_objc_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_objc:
Options.ObjC1 = Options.ObjC2 = 1;
break;
case langkind_objcxx_cpp:
NoPreprocess = true;
// FALLTHROUGH
case langkind_objcxx:
Options.ObjC1 = Options.ObjC2 = 1;
Options.CPlusPlus = 1;
break;
}
}
/// LangStds - Language standards we support.
enum LangStds {
lang_unspecified,
lang_c89, lang_c94, lang_c99,
lang_gnu89, lang_gnu99,
lang_cxx98, lang_gnucxx98,
lang_cxx0x, lang_gnucxx0x
};
static llvm::cl::opt<LangStds>
LangStd("std", llvm::cl::desc("Language standard to compile for"),
llvm::cl::init(lang_unspecified),
llvm::cl::values(clEnumValN(lang_c89, "c89", "ISO C 1990"),
clEnumValN(lang_c89, "c90", "ISO C 1990"),
clEnumValN(lang_c89, "iso9899:1990", "ISO C 1990"),
clEnumValN(lang_c94, "iso9899:199409",
"ISO C 1990 with amendment 1"),
clEnumValN(lang_c99, "c99", "ISO C 1999"),
// clEnumValN(lang_c99, "c9x", "ISO C 1999"),
clEnumValN(lang_c99, "iso9899:1999", "ISO C 1999"),
// clEnumValN(lang_c99, "iso9899:199x", "ISO C 1999"),
clEnumValN(lang_gnu89, "gnu89",
"ISO C 1990 with GNU extensions (default for C)"),
clEnumValN(lang_gnu99, "gnu99",
"ISO C 1999 with GNU extensions"),
clEnumValN(lang_gnu99, "gnu9x",
"ISO C 1999 with GNU extensions"),
clEnumValN(lang_cxx98, "c++98",
"ISO C++ 1998 with amendments"),
clEnumValN(lang_gnucxx98, "gnu++98",
"ISO C++ 1998 with amendments and GNU "
"extensions (default for C++)"),
clEnumValN(lang_cxx0x, "c++0x",
"Upcoming ISO C++ 200x with amendments"),
clEnumValN(lang_gnucxx0x, "gnu++0x",
"Upcoming ISO C++ 200x with amendments and GNU "
"extensions (default for C++)"),
clEnumValEnd));
static llvm::cl::opt<bool>
NoOperatorNames("fno-operator-names",
llvm::cl::desc("Do not treat C++ operator name keywords as "
"synonyms for operators"));
static llvm::cl::opt<bool>
PascalStrings("fpascal-strings",
llvm::cl::desc("Recognize and construct Pascal-style "
"string literals"));
static llvm::cl::opt<bool>
WritableStrings("fwritable-strings",
llvm::cl::desc("Store string literals as writable data."));
static llvm::cl::opt<bool>
LaxVectorConversions("flax-vector-conversions",
llvm::cl::desc("Allow implicit conversions between vectors"
" with a different number of elements or "
"different element types."));
// FIXME: add:
// -ansi
// -trigraphs
// -fdollars-in-identifiers
// -fpascal-strings
static void InitializeLanguageStandard(LangOptions &Options, LangKind LK) {
if (LangStd == lang_unspecified) {
// Based on the base language, pick one.
switch (LK) {
default: assert(0 && "Unknown base language");
case langkind_c:
case langkind_c_cpp:
case langkind_objc:
case langkind_objc_cpp:
LangStd = lang_gnu99;
break;
case langkind_cxx:
case langkind_cxx_cpp:
case langkind_objcxx:
case langkind_objcxx_cpp:
LangStd = lang_gnucxx98;
break;
}
}
switch (LangStd) {
default: assert(0 && "Unknown language standard!");
// Fall through from newer standards to older ones. This isn't really right.
// FIXME: Enable specifically the right features based on the language stds.
case lang_gnucxx0x:
case lang_cxx0x:
Options.CPlusPlus0x = 1;
// FALL THROUGH
case lang_gnucxx98:
case lang_cxx98:
Options.CPlusPlus = 1;
Options.CXXOperatorNames = !NoOperatorNames;
Options.Boolean = 1;
// FALL THROUGH.
case lang_gnu99:
case lang_c99:
Options.Digraphs = 1;
Options.C99 = 1;
Options.HexFloats = 1;
// FALL THROUGH.
case lang_gnu89:
Options.BCPLComment = 1; // Only for C99/C++.
// FALL THROUGH.
case lang_c94:
case lang_c89:
break;
}
Options.Trigraphs = 1; // -trigraphs or -ansi
Options.DollarIdents = 1; // FIXME: Really a target property.
Options.PascalStrings = PascalStrings;
Options.WritableStrings = WritableStrings;
Options.LaxVectorConversions = LaxVectorConversions;
}
//===----------------------------------------------------------------------===//
// Our DiagnosticClient implementation
//===----------------------------------------------------------------------===//
// FIXME: Werror should take a list of things, -Werror=foo,bar
static llvm::cl::opt<bool>
WarningsAsErrors("Werror", llvm::cl::desc("Treat all warnings as errors"));
static llvm::cl::opt<bool>
WarnOnExtensions("pedantic", llvm::cl::init(false),
llvm::cl::desc("Issue a warning on uses of GCC extensions"));
static llvm::cl::opt<bool>
ErrorOnExtensions("pedantic-errors",
llvm::cl::desc("Issue an error on uses of GCC extensions"));
static llvm::cl::opt<bool>
WarnUnusedMacros("Wunused_macros",
llvm::cl::desc("Warn for unused macros in the main translation unit"));
static llvm::cl::opt<bool>
WarnFloatEqual("Wfloat-equal",
llvm::cl::desc("Warn about equality comparisons of floating point values."));
static llvm::cl::opt<bool>
WarnNoFormatNonLiteral("Wno-format-nonliteral",
llvm::cl::desc("Do not warn about non-literal format strings."));
static llvm::cl::opt<bool>
WarnUndefMacros("Wundef",
llvm::cl::desc("Warn on use of undefined macros in #if's"));
/// InitializeDiagnostics - Initialize the diagnostic object, based on the
/// current command line option settings.
static void InitializeDiagnostics(Diagnostic &Diags) {
Diags.setWarningsAsErrors(WarningsAsErrors);
Diags.setWarnOnExtensions(WarnOnExtensions);
Diags.setErrorOnExtensions(ErrorOnExtensions);
// Silence the "macro is not used" warning unless requested.
if (!WarnUnusedMacros)
Diags.setDiagnosticMapping(diag::pp_macro_not_used, diag::MAP_IGNORE);
// Silence "floating point comparison" warnings unless requested.
if (!WarnFloatEqual)
Diags.setDiagnosticMapping(diag::warn_floatingpoint_eq, diag::MAP_IGNORE);
// Silence "format string is not a string literal" warnings if requested
if (WarnNoFormatNonLiteral)
Diags.setDiagnosticMapping(diag::warn_printf_not_string_constant,
diag::MAP_IGNORE);
if (!WarnUndefMacros)
Diags.setDiagnosticMapping(diag::warn_pp_undef_identifier,diag::MAP_IGNORE);
}
//===----------------------------------------------------------------------===//
// Target Triple Processing.
//===----------------------------------------------------------------------===//
static llvm::cl::opt<std::string>
TargetTriple("triple",
llvm::cl::desc("Specify target triple (e.g. i686-apple-darwin9)."));
static llvm::cl::list<std::string>
Archs("arch",
llvm::cl::desc("Specify target architecture (e.g. i686)."));
namespace {
class TripleProcessor {
llvm::StringMap<char> TriplesProcessed;
std::vector<std::string>& triples;
public:
TripleProcessor(std::vector<std::string>& t) : triples(t) {}
void addTriple(const std::string& t) {
if (TriplesProcessed.find(t.c_str(),t.c_str()+t.size()) ==
TriplesProcessed.end()) {
triples.push_back(t);
TriplesProcessed.GetOrCreateValue(t.c_str(),t.c_str()+t.size());
}
}
};
}
static void CreateTargetTriples(std::vector<std::string>& triples) {
// Initialize base triple. If a -triple option has been specified, use
// that triple. Otherwise, default to the host triple.
std::string Triple = TargetTriple;
if (Triple.empty()) Triple = LLVM_HOSTTRIPLE;
// Decompose the base triple into "arch" and suffix.
std::string::size_type firstDash = Triple.find("-");
if (firstDash == std::string::npos) {
fprintf(stderr,
"Malformed target triple: \"%s\" ('-' could not be found).\n",
Triple.c_str());
exit(1);
}
std::string suffix(Triple, firstDash+1);
if (suffix.empty()) {
fprintf(stderr, "Malformed target triple: \"%s\" (no vendor or OS).\n",
Triple.c_str());
exit(1);
}
// Create triple cacher.
TripleProcessor tp(triples);
// Add the primary triple to our set of triples if we are using the
// host-triple with no archs or using a specified target triple.
if (!TargetTriple.getValue().empty() || Archs.empty())
tp.addTriple(Triple);
for (unsigned i = 0, e = Archs.size(); i !=e; ++i)
tp.addTriple(Archs[i] + "-" + suffix);
}
//===----------------------------------------------------------------------===//
// Preprocessor Initialization
//===----------------------------------------------------------------------===//
// FIXME: Preprocessor builtins to support.
// -A... - Play with #assertions
// -undef - Undefine all predefined macros
static llvm::cl::list<std::string>
D_macros("D", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Predefine the specified macro"));
static llvm::cl::list<std::string>
U_macros("U", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Undefine the specified macro"));
static llvm::cl::list<std::string>
ImplicitIncludes("include", llvm::cl::value_desc("file"),
llvm::cl::desc("Include file before parsing"));
// Append a #define line to Buf for Macro. Macro should be of the form XXX,
// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
// "#define XXX Y z W". To get a #define with no value, use "XXX=".
static void DefineBuiltinMacro(std::vector<char> &Buf, const char *Macro,
const char *Command = "#define ") {
Buf.insert(Buf.end(), Command, Command+strlen(Command));
if (const char *Equal = strchr(Macro, '=')) {
// Turn the = into ' '.
Buf.insert(Buf.end(), Macro, Equal);
Buf.push_back(' ');
Buf.insert(Buf.end(), Equal+1, Equal+strlen(Equal));
} else {
// Push "macroname 1".
Buf.insert(Buf.end(), Macro, Macro+strlen(Macro));
Buf.push_back(' ');
Buf.push_back('1');
}
Buf.push_back('\n');
}
/// AddImplicitInclude - Add an implicit #include of the specified file to the
/// predefines buffer.
static void AddImplicitInclude(std::vector<char> &Buf, const std::string &File){
const char *Inc = "#include \"";
Buf.insert(Buf.end(), Inc, Inc+strlen(Inc));
Buf.insert(Buf.end(), File.begin(), File.end());
Buf.push_back('"');
Buf.push_back('\n');
}
/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file. This returns the file ID for the
/// input file. If a failure happens, it returns 0.
///
static unsigned InitializePreprocessor(Preprocessor &PP,
const std::string &InFile,
std::vector<char> &PredefineBuffer) {
FileManager &FileMgr = PP.getFileManager();
// Figure out where to get and map in the main file.
SourceManager &SourceMgr = PP.getSourceManager();
if (InFile != "-") {
const FileEntry *File = FileMgr.getFile(InFile);
if (File) SourceMgr.createMainFileID(File, SourceLocation());
if (SourceMgr.getMainFileID() == 0) {
fprintf(stderr, "Error reading '%s'!\n",InFile.c_str());
return 0;
}
} else {
llvm::MemoryBuffer *SB = llvm::MemoryBuffer::getSTDIN();
if (SB) SourceMgr.createMainFileIDForMemBuffer(SB);
if (SourceMgr.getMainFileID() == 0) {
fprintf(stderr, "Error reading standard input! Empty?\n");
return 0;
}
}
// Add macros from the command line.
// FIXME: Should traverse the #define/#undef lists in parallel.
for (unsigned i = 0, e = D_macros.size(); i != e; ++i)
DefineBuiltinMacro(PredefineBuffer, D_macros[i].c_str());
for (unsigned i = 0, e = U_macros.size(); i != e; ++i)
DefineBuiltinMacro(PredefineBuffer, U_macros[i].c_str(), "#undef ");
// FIXME: Read any files specified by -imacros.
// Add implicit #includes from -include.
for (unsigned i = 0, e = ImplicitIncludes.size(); i != e; ++i)
AddImplicitInclude(PredefineBuffer, ImplicitIncludes[i]);
// Null terminate PredefinedBuffer and add it.
PredefineBuffer.push_back(0);
PP.setPredefines(&PredefineBuffer[0]);
// Once we've read this, we're done.
return SourceMgr.getMainFileID();
}
//===----------------------------------------------------------------------===//
// Preprocessor include path information.
//===----------------------------------------------------------------------===//
// This tool exports a large number of command line options to control how the
// preprocessor searches for header files. At root, however, the Preprocessor
// object takes a very simple interface: a list of directories to search for
//
// FIXME: -nostdinc,-nostdinc++
// FIXME: -imultilib
//
// FIXME: -imacros
static llvm::cl::opt<bool>
nostdinc("nostdinc", llvm::cl::desc("Disable standard #include directories"));
// Various command line options. These four add directories to each chain.
static llvm::cl::list<std::string>
F_dirs("F", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to framework include search path"));
static llvm::cl::list<std::string>
I_dirs("I", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to include search path"));
static llvm::cl::list<std::string>
idirafter_dirs("idirafter", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to AFTER include search path"));
static llvm::cl::list<std::string>
iquote_dirs("iquote", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to QUOTE include search path"));
static llvm::cl::list<std::string>
isystem_dirs("isystem", llvm::cl::value_desc("directory"), llvm::cl::Prefix,
llvm::cl::desc("Add directory to SYSTEM include search path"));
// These handle -iprefix/-iwithprefix/-iwithprefixbefore.
static llvm::cl::list<std::string>
iprefix_vals("iprefix", llvm::cl::value_desc("prefix"), llvm::cl::Prefix,
llvm::cl::desc("Set the -iwithprefix/-iwithprefixbefore prefix"));
static llvm::cl::list<std::string>
iwithprefix_vals("iwithprefix", llvm::cl::value_desc("dir"), llvm::cl::Prefix,
llvm::cl::desc("Set directory to SYSTEM include search path with prefix"));
static llvm::cl::list<std::string>
iwithprefixbefore_vals("iwithprefixbefore", llvm::cl::value_desc("dir"),
llvm::cl::Prefix,
llvm::cl::desc("Set directory to include search path with prefix"));
static llvm::cl::opt<std::string>
isysroot("isysroot", llvm::cl::value_desc("dir"), llvm::cl::init("/"),
llvm::cl::desc("Set the system root directory (usually /)"));
// Finally, implement the code that groks the options above.
enum IncludeDirGroup {
Quoted = 0,
Angled,
System,
After
};
static std::vector<DirectoryLookup> IncludeGroup[4];
/// AddPath - Add the specified path to the specified group list.
///
static void AddPath(const std::string &Path, IncludeDirGroup Group,
bool isCXXAware, bool isUserSupplied,
bool isFramework, HeaderSearch &HS) {
assert(!Path.empty() && "can't handle empty path here");
FileManager &FM = HS.getFileMgr();
// Compute the actual path, taking into consideration -isysroot.
llvm::SmallString<256> MappedPath;
// Handle isysroot.
if (Group == System) {
// FIXME: Portability. This should be a sys::Path interface, this doesn't
// handle things like C:\ right, nor win32 \\network\device\blah.
if (isysroot.size() != 1 || isysroot[0] != '/') // Add isysroot if present.
MappedPath.append(isysroot.begin(), isysroot.end());
if (Path[0] != '/') // If in the system group, add a /.
MappedPath.push_back('/');
}
MappedPath.append(Path.begin(), Path.end());
// Compute the DirectoryLookup type.
DirectoryLookup::DirType Type;
if (Group == Quoted || Group == Angled)
Type = DirectoryLookup::NormalHeaderDir;
else if (isCXXAware)
Type = DirectoryLookup::SystemHeaderDir;
else
Type = DirectoryLookup::ExternCSystemHeaderDir;
// If the directory exists, add it.
if (const DirectoryEntry *DE = FM.getDirectory(&MappedPath[0],
&MappedPath[0]+
MappedPath.size())) {
IncludeGroup[Group].push_back(DirectoryLookup(DE, Type, isUserSupplied,
isFramework));
return;
}
// Check to see if this is an apple-style headermap (which are not allowed to
// be frameworks).
if (!isFramework) {
if (const FileEntry *FE = FM.getFile(&MappedPath[0],
&MappedPath[0]+MappedPath.size())) {
if (const HeaderMap *HM = HS.CreateHeaderMap(FE)) {
// It is a headermap, add it to the search path.
IncludeGroup[Group].push_back(DirectoryLookup(HM, Type,isUserSupplied));
return;
}
}
}
if (Verbose)
fprintf(stderr, "ignoring nonexistent directory \"%s\"\n", Path.c_str());
}
/// RemoveDuplicates - If there are duplicate directory entries in the specified
/// search list, remove the later (dead) ones.
static void RemoveDuplicates(std::vector<DirectoryLookup> &SearchList) {
llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
for (unsigned i = 0; i != SearchList.size(); ++i) {
if (SearchList[i].isNormalDir()) {
// If this isn't the first time we've seen this dir, remove it.
if (SeenDirs.insert(SearchList[i].getDir()))
continue;
if (Verbose)
fprintf(stderr, "ignoring duplicate directory \"%s\"\n",
SearchList[i].getDir()->getName());
} else if (SearchList[i].isFramework()) {
// If this isn't the first time we've seen this framework dir, remove it.
if (SeenFrameworkDirs.insert(SearchList[i].getFrameworkDir()))
continue;
if (Verbose)
fprintf(stderr, "ignoring duplicate framework \"%s\"\n",
SearchList[i].getFrameworkDir()->getName());
} else {
assert(SearchList[i].isHeaderMap() && "Not a headermap or normal dir?");
// If this isn't the first time we've seen this headermap, remove it.
if (SeenHeaderMaps.insert(SearchList[i].getHeaderMap()))
continue;
if (Verbose)
fprintf(stderr, "ignoring duplicate directory \"%s\"\n",
SearchList[i].getDir()->getName());
}
// This is reached if the current entry is a duplicate.
SearchList.erase(SearchList.begin()+i);
--i;
}
}
/// InitializeIncludePaths - Process the -I options and set them in the
/// HeaderSearch object.
static void InitializeIncludePaths(HeaderSearch &Headers, FileManager &FM,
const LangOptions &Lang) {
// Handle -F... options.
for (unsigned i = 0, e = F_dirs.size(); i != e; ++i)
AddPath(F_dirs[i], Angled, false, true, true, Headers);
// Handle -I... options.
for (unsigned i = 0, e = I_dirs.size(); i != e; ++i)
AddPath(I_dirs[i], Angled, false, true, false, Headers);
// Handle -idirafter... options.
for (unsigned i = 0, e = idirafter_dirs.size(); i != e; ++i)
AddPath(idirafter_dirs[i], After, false, true, false, Headers);
// Handle -iquote... options.
for (unsigned i = 0, e = iquote_dirs.size(); i != e; ++i)
AddPath(iquote_dirs[i], Quoted, false, true, false, Headers);
// Handle -isystem... options.
for (unsigned i = 0, e = isystem_dirs.size(); i != e; ++i)
AddPath(isystem_dirs[i], System, false, true, false, Headers);
// Walk the -iprefix/-iwithprefix/-iwithprefixbefore argument lists in
// parallel, processing the values in order of occurance to get the right
// prefixes.
{
std::string Prefix = ""; // FIXME: this isn't the correct default prefix.
unsigned iprefix_idx = 0;
unsigned iwithprefix_idx = 0;
unsigned iwithprefixbefore_idx = 0;
bool iprefix_done = iprefix_vals.empty();
bool iwithprefix_done = iwithprefix_vals.empty();
bool iwithprefixbefore_done = iwithprefixbefore_vals.empty();
while (!iprefix_done || !iwithprefix_done || !iwithprefixbefore_done) {
if (!iprefix_done &&
(iwithprefix_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefix_vals.getPosition(iwithprefix_idx)) &&
(iwithprefixbefore_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
Prefix = iprefix_vals[iprefix_idx];
++iprefix_idx;
iprefix_done = iprefix_idx == iprefix_vals.size();
} else if (!iwithprefix_done &&
(iwithprefixbefore_done ||
iwithprefix_vals.getPosition(iwithprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
AddPath(Prefix+iwithprefix_vals[iwithprefix_idx],
System, false, false, false, Headers);
++iwithprefix_idx;
iwithprefix_done = iwithprefix_idx == iwithprefix_vals.size();
} else {
AddPath(Prefix+iwithprefixbefore_vals[iwithprefixbefore_idx],
Angled, false, false, false, Headers);
++iwithprefixbefore_idx;
iwithprefixbefore_done =
iwithprefixbefore_idx == iwithprefixbefore_vals.size();
}
}
}
// FIXME: Add contents of the CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
// OBJC_INCLUDE_PATH, OBJCPLUS_INCLUDE_PATH environment variables.
// FIXME: temporary hack: hard-coded paths.
// FIXME: get these from the target?
if (!nostdinc) {
if (Lang.CPlusPlus) {
AddPath("/usr/include/c++/4.0.0", System, true, false, false, Headers);
AddPath("/usr/include/c++/4.0.0/i686-apple-darwin8", System, true, false,
false, Headers);
AddPath("/usr/include/c++/4.0.0/backward", System, true, false, false,
Headers);
}
AddPath("/usr/local/include", System, false, false, false, Headers);
// leopard
AddPath("/usr/lib/gcc/i686-apple-darwin9/4.0.1/include", System,
false, false, false, Headers);
AddPath("/usr/lib/gcc/powerpc-apple-darwin9/4.0.1/include",
System, false, false, false, Headers);
AddPath("/usr/lib/gcc/powerpc-apple-darwin9/"
"4.0.1/../../../../powerpc-apple-darwin0/include",
System, false, false, false, Headers);
// tiger
AddPath("/usr/lib/gcc/i686-apple-darwin8/4.0.1/include", System,
false, false, false, Headers);
AddPath("/usr/lib/gcc/powerpc-apple-darwin8/4.0.1/include",
System, false, false, false, Headers);
AddPath("/usr/lib/gcc/powerpc-apple-darwin8/"
"4.0.1/../../../../powerpc-apple-darwin8/include",
System, false, false, false, Headers);
// Ubuntu 7.10 - Gutsy Gibbon
AddPath("/usr/lib/gcc/i486-linux-gnu/4.1.3/include", System,
false, false, false, Headers);
AddPath("/usr/include", System, false, false, false, Headers);
AddPath("/System/Library/Frameworks", System, true, false, true, Headers);
AddPath("/Library/Frameworks", System, true, false, true, Headers);
}
// Now that we have collected all of the include paths, merge them all
// together and tell the preprocessor about them.
// Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
std::vector<DirectoryLookup> SearchList;
SearchList = IncludeGroup[Angled];
SearchList.insert(SearchList.end(), IncludeGroup[System].begin(),
IncludeGroup[System].end());
SearchList.insert(SearchList.end(), IncludeGroup[After].begin(),
IncludeGroup[After].end());
RemoveDuplicates(SearchList);
RemoveDuplicates(IncludeGroup[Quoted]);
// Prepend QUOTED list on the search list.
SearchList.insert(SearchList.begin(), IncludeGroup[Quoted].begin(),
IncludeGroup[Quoted].end());
bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
Headers.SetSearchPaths(SearchList, IncludeGroup[Quoted].size(),
DontSearchCurDir);
// If verbose, print the list of directories that will be searched.
if (Verbose) {
fprintf(stderr, "#include \"...\" search starts here:\n");
unsigned QuotedIdx = IncludeGroup[Quoted].size();
for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
if (i == QuotedIdx)
fprintf(stderr, "#include <...> search starts here:\n");
const char *Name = SearchList[i].getName();
const char *Suffix;
if (SearchList[i].isNormalDir())
Suffix = "";
else if (SearchList[i].isFramework())
Suffix = " (framework directory)";
else {
assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
Suffix = " (headermap)";
}
fprintf(stderr, " %s%s\n", Name, Suffix);
}
fprintf(stderr, "End of search list.\n");
}
}
//===----------------------------------------------------------------------===//
// Basic Parser driver
//===----------------------------------------------------------------------===//
static void ParseFile(Preprocessor &PP, MinimalAction *PA){
Parser P(PP, *PA);
PP.EnterMainSourceFile();
// Parsing the specified input file.
P.ParseTranslationUnit();
delete PA;
}
//===----------------------------------------------------------------------===//
// Main driver
//===----------------------------------------------------------------------===//
/// CreateASTConsumer - Create the ASTConsumer for the corresponding program
/// action. These consumers can operate on both ASTs that are freshly
/// parsed from source files as well as those deserialized from Bitcode.
static ASTConsumer* CreateASTConsumer(const std::string& InFile,
Diagnostic& Diag, FileManager& FileMgr,
const LangOptions& LangOpts) {
switch (ProgAction) {
default:
return NULL;
case ASTPrint:
return CreateASTPrinter();
case ASTDump:
return CreateASTDumper();
case ASTView:
return CreateASTViewer();
case ParseCFGDump:
case ParseCFGView:
return CreateCFGDumper(ProgAction == ParseCFGView);
case AnalysisLiveVariables:
return CreateLiveVarAnalyzer();
case WarnDeadStores:
return CreateDeadStoreChecker(Diag);
case WarnUninitVals:
return CreateUnitValsChecker(Diag);
case AnalysisGRConstants:
return CreateGRConstants();
case TestSerialization:
return CreateSerializationTest(Diag, FileMgr, LangOpts);
case EmitLLVM:
return CreateLLVMEmitter(Diag, LangOpts);
case EmitBC:
return CreateBCWriter(InFile, OutputFile, Diag, LangOpts);
case SerializeAST:
// FIXME: Allow user to tailor where the file is written.
return CreateASTSerializer(InFile, OutputFile, Diag, LangOpts);
case RewriteTest:
return CreateCodeRewriterTest(InFile, Diag);
}
}
/// ProcessInputFile - Process a single input file with the specified state.
///
static void ProcessInputFile(Preprocessor &PP, const std::string &InFile,
TextDiagnostics &OurDiagnosticClient) {
ASTConsumer* Consumer = NULL;
bool ClearSourceMgr = false;
switch (ProgAction) {
default:
Consumer = CreateASTConsumer(InFile,
PP.getDiagnostics(),
PP.getFileManager(),
PP.getLangOptions());
if (!Consumer) {
fprintf(stderr, "Unexpected program action!\n");
return;
}
break;
case DumpTokens: { // Token dump mode.
Token Tok;
// Start parsing the specified input file.
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
PP.DumpToken(Tok, true);
fprintf(stderr, "\n");
} while (Tok.isNot(tok::eof));
ClearSourceMgr = true;
break;
}
case RunPreprocessorOnly: { // Just lex as fast as we can, no output.
Token Tok;
// Start parsing the specified input file.
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
} while (Tok.isNot(tok::eof));
ClearSourceMgr = true;
break;
}
case PrintPreprocessedInput: // -E mode.
DoPrintPreprocessedInput(PP, OutputFile);
ClearSourceMgr = true;
break;
case ParseNoop: // -parse-noop
ParseFile(PP, new MinimalAction(PP.getIdentifierTable()));
ClearSourceMgr = true;
break;
case ParsePrintCallbacks:
ParseFile(PP, CreatePrintParserActionsAction(PP.getIdentifierTable()));
ClearSourceMgr = true;
break;
case ParseSyntaxOnly: // -fsyntax-only
Consumer = new ASTConsumer();
break;
}
if (Consumer) {
if (VerifyDiagnostics)
exit(CheckASTConsumer(PP, Consumer));
// This deletes Consumer.
ParseAST(PP, Consumer, Stats);
}
if (Stats) {
fprintf(stderr, "\nSTATISTICS FOR '%s':\n", InFile.c_str());
PP.PrintStats();
PP.getIdentifierTable().PrintStats();
PP.getHeaderSearchInfo().PrintStats();
if (ClearSourceMgr)
PP.getSourceManager().PrintStats();
fprintf(stderr, "\n");
}
// For a multi-file compilation, some things are ok with nuking the source
// manager tables, other require stable fileid/macroid's across multiple
// files.
if (ClearSourceMgr)
PP.getSourceManager().clearIDTables();
}
static void ProcessSerializedFile(const std::string& InFile, Diagnostic& Diag,
FileManager& FileMgr) {
if (VerifyDiagnostics) {
fprintf(stderr, "-verify does not yet work with serialized ASTs.\n");
exit (1);
}
llvm::sys::Path Filename(InFile);
if (!Filename.isValid()) {
fprintf(stderr, "serialized file '%s' not available.\n",InFile.c_str());
exit (1);
}
llvm::OwningPtr<TranslationUnit> TU(ReadASTBitcodeFile(Filename,FileMgr));
if (!TU) {
fprintf(stderr, "error: file '%s' could not be deserialized\n",
InFile.c_str());
exit (1);
}
// Observe that we use the source file name stored in the deserialized
// translation unit, rather than InFile.
llvm::OwningPtr<ASTConsumer>
Consumer(CreateASTConsumer(InFile, Diag, FileMgr, TU->getLangOpts()));
if (!Consumer) {
fprintf(stderr, "Unsupported program action with serialized ASTs!\n");
exit (1);
}
Consumer->Initialize(*TU->getContext());
for (TranslationUnit::iterator I=TU->begin(), E=TU->end(); I!=E; ++I)
Consumer->HandleTopLevelDecl(*I);
}
static llvm::cl::list<std::string>
InputFilenames(llvm::cl::Positional, llvm::cl::desc("<input files>"));
static bool isSerializedFile(const std::string& InFile) {
if (InFile.size() < 4)
return false;
const char* s = InFile.c_str()+InFile.size()-4;
return s[0] == '.' &&
s[1] == 'a' &&
s[2] == 's' &&
s[3] == 't';
}
int main(int argc, char **argv) {
llvm::cl::ParseCommandLineOptions(argc, argv, " llvm cfe\n");
llvm::sys::PrintStackTraceOnErrorSignal();
// If no input was specified, read from stdin.
if (InputFilenames.empty())
InputFilenames.push_back("-");
// Create a file manager object to provide access to and cache the filesystem.
FileManager FileMgr;
// Create the diagnostic client for reporting errors or for
// implementing -verify.
std::auto_ptr<TextDiagnostics> DiagClient;
if (!VerifyDiagnostics) {
// Print diagnostics to stderr by default.
DiagClient.reset(new TextDiagnosticPrinter());
} else {
// When checking diagnostics, just buffer them up.
DiagClient.reset(new TextDiagnosticBuffer());
if (InputFilenames.size() != 1) {
fprintf(stderr,
"-verify only works on single input files for now.\n");
return 1;
}
}
// Configure our handling of diagnostics.
Diagnostic Diags(*DiagClient);
InitializeDiagnostics(Diags);
// -I- is a deprecated GCC feature, scan for it and reject it.
for (unsigned i = 0, e = I_dirs.size(); i != e; ++i) {
if (I_dirs[i] == "-") {
Diags.Report(diag::err_pp_I_dash_not_supported);
I_dirs.erase(I_dirs.begin()+i);
--i;
}
}
for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
const std::string &InFile = InputFilenames[i];
if (isSerializedFile(InFile))
ProcessSerializedFile(InFile,Diags,FileMgr);
else {
/// Create a SourceManager object. This tracks and owns all the file
/// buffers allocated to a translation unit.
SourceManager SourceMgr;
// Initialize language options, inferring file types from input filenames.
LangOptions LangInfo;
InitializeBaseLanguage();
LangKind LK = GetLanguage(InFile);
InitializeLangOptions(LangInfo, LK);
InitializeLanguageStandard(LangInfo, LK);
// Process the -I options and set them in the HeaderInfo.
HeaderSearch HeaderInfo(FileMgr);
DiagClient->setHeaderSearch(HeaderInfo);
InitializeIncludePaths(HeaderInfo, FileMgr, LangInfo);
// Get information about the targets being compiled for. Note that this
// pointer and the TargetInfoImpl objects are never deleted by this toy
// driver.
TargetInfo *Target;
// Create triples, and create the TargetInfo.
std::vector<std::string> triples;
CreateTargetTriples(triples);
Target = TargetInfo::CreateTargetInfo(&triples[0],
&triples[0]+triples.size(),
&Diags);
if (Target == 0) {
fprintf(stderr, "Sorry, I don't know what target this is: %s\n",
triples[0].c_str());
fprintf(stderr, "Please use -triple or -arch.\n");
exit(1);
}
// Set up the preprocessor with these options.
Preprocessor PP(Diags, LangInfo, *Target, SourceMgr, HeaderInfo);
std::vector<char> PredefineBuffer;
if (!InitializePreprocessor(PP, InFile, PredefineBuffer))
continue;
ProcessInputFile(PP, InFile, *DiagClient);
HeaderInfo.ClearFileInfo();
if (Stats)
SourceMgr.PrintStats();
}
}
unsigned NumDiagnostics = Diags.getNumDiagnostics();
if (NumDiagnostics)
fprintf(stderr, "%d diagnostic%s generated.\n", NumDiagnostics,
(NumDiagnostics == 1 ? "" : "s"));
if (Stats) {
FileMgr.PrintStats();
fprintf(stderr, "\n");
}
return Diags.getNumErrors() != 0;
}
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